PSR B0531+21
E1338578
UNEXPLORED
PSR B0531+21 is the highly magnetized, rapidly rotating neutron star at the center of the Crab Nebula, serving as one of the most studied pulsars in astrophysics.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Crab Pulsar | 4 |
| PSR B0531+21 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T18695642 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: PSR B0531+21 Context triple: [Crab Pulsar, hasDesignation, PSR B0531+21]
-
A.
Scorpius X-1
Scorpius X-1 is a bright low-mass X-ray binary system and one of the strongest persistent X-ray sources in the sky, located in the constellation Scorpius.
-
B.
Holmberg II X-1
Holmberg II X-1 is an ultraluminous X-ray source in the dwarf galaxy Holmberg II, believed to be powered by accretion onto a compact object such as a black hole.
-
C.
Cygnus X-2
Cygnus X-2 is a bright low-mass X-ray binary system in the constellation Cygnus, consisting of a neutron star accreting matter from a companion star and serving as an important source for studying X-ray emission and compact objects.
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D.
IM Pegasi
IM Pegasi is a nearby RS Canum Venaticorum-type binary star system in the constellation Pegasus, notable for its strong radio emissions and use as the guide star for the Gravity Probe B relativity experiment.
-
E.
Cygnus X-3
Cygnus X-3 is a powerful X-ray binary system in the constellation Cygnus, believed to consist of a compact object such as a black hole or neutron star orbiting a massive companion star and known for its intense X-ray and gamma-ray emissions.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: PSR B0531+21 Target entity description: PSR B0531+21 is the highly magnetized, rapidly rotating neutron star at the center of the Crab Nebula, serving as one of the most studied pulsars in astrophysics.
-
A.
Scorpius X-1
Scorpius X-1 is a bright low-mass X-ray binary system and one of the strongest persistent X-ray sources in the sky, located in the constellation Scorpius.
-
B.
Holmberg II X-1
Holmberg II X-1 is an ultraluminous X-ray source in the dwarf galaxy Holmberg II, believed to be powered by accretion onto a compact object such as a black hole.
-
C.
Cygnus X-2
Cygnus X-2 is a bright low-mass X-ray binary system in the constellation Cygnus, consisting of a neutron star accreting matter from a companion star and serving as an important source for studying X-ray emission and compact objects.
-
D.
IM Pegasi
IM Pegasi is a nearby RS Canum Venaticorum-type binary star system in the constellation Pegasus, notable for its strong radio emissions and use as the guide star for the Gravity Probe B relativity experiment.
-
E.
Cygnus X-3
Cygnus X-3 is a powerful X-ray binary system in the constellation Cygnus, believed to consist of a compact object such as a black hole or neutron star orbiting a massive companion star and known for its intense X-ray and gamma-ray emissions.
- F. None of above. chosen
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Crab Nebula
linked to: PSR B0531+21
linked to: PSR B0531+21
linked to: PSR B0531+21